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Cashew nut oil-modified phenolic resin and preparation method thereof

A technology of phenolic resin and cashew nut oil, which is applied in the field of cashew nut oil modified phenolic resin and its preparation, can solve the problems of uncontrollable, gel, violent reaction, etc., and achieve the effect of improving compatibility, easy availability of raw materials, and low price

Active Publication Date: 2012-07-11
BEIJING RED AVENUE INNOVA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this preparation method is that the reaction is violent and uncontrollable, and it is easy to cause gel

Method used

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  • Cashew nut oil-modified phenolic resin and preparation method thereof
  • Cashew nut oil-modified phenolic resin and preparation method thereof
  • Cashew nut oil-modified phenolic resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] 147 kg of phenol and 2.29 kg of p-toluenesulfonic acid were added to the reactor, the temperature was raised to 100°C and 45.9 kg of formaldehyde solution with a mass concentration of 37% and 14.1 kg of paraformaldehyde were sequentially added. The water generated by the reaction is distilled off to obtain a phenol-formaldehyde polycondensate. Then add 52 kg of cashew nut oil into the phenol-formaldehyde polycondensate, control the reaction temperature at 160°C and react for 2.5 hours, keep it under the condition of vacuum degree -0.08MPa for 15 minutes, and then neutralize it with 2.07 kg of DBU to obtain modified cashew nut oil. Reactive phenolic resin. The resin has a softening point of 92.5°C and a free phenol content of 0.69%.

Embodiment 2

[0037] Add 147 kg of phenol and 2.9 kg of p-toluenesulfonic acid into the reactor, heat up to 90°C and add 90 kg of formaldehyde solution with a mass concentration of 37%, react at 100°C for 1 hour after the addition of formaldehyde, and steam the water generated by the reaction. A phenol-formaldehyde condensation polymer was obtained. Then add 52 kg of cashew nut oil into the phenol-formaldehyde condensation polymer, control the reaction temperature at 180°C and react for 1 hour, keep it under the condition of vacuum degree -0.09MPa for 15 minutes, and then neutralize with 2.26 kg of triethanolamine to obtain modified cashew nut oil. Reactive phenolic resin. The resin has a softening point of 97.3°C and a free phenol content of 0.05%.

Embodiment 3

[0039] Add 147 kg of phenol and 3.41 kg of dodecylbenzenesulfonic acid into the reactor, raise the temperature to 90°C and add 62.9 kg of formaldehyde solution with a mass concentration of 37%, react at 100°C for 1 hour after the addition of formaldehyde, and evaporate to form of water to obtain phenol-formaldehyde condensation polymers. Then add 36 kg of cashew nut oil into the phenol-formaldehyde polycondensate, control the reaction temperature at 180°C and react for 1.5 hours, keep it for 15 minutes under the condition of vacuum degree -0.1MPa, and then neutralize with 0.88 kg of 50% NaOH to obtain cashew nut oil. Reactive phenolic resin. The resin had a softening point of 104°C and a free phenol content of 1.05%.

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Abstract

The invention discloses cashew nut oil-modified phenolic resin and a preparation method thereof. The method comprises the following steps of: making phenol and formaldehyde react under the condition of an acid catalyst to prepare a phenol-formaldehyde polycondensate; and adding cashew nut oil into the phenol-formaldehyde polycondensate, controlling the reaction temperature at 150-220 DEG C, keeping reacting for 1-5 hours, distilling under reduced pressure at the vacuum degree of between -0.03 MPa and -0.1MPa till the softening point of resin is 70-120 DEG C, and neutralizing the acid catalyst with a neutralizer to obtain the cashew nut oil-modified phenolic resin, wherein the molar ratio of the formaldehyde to the phenol is (0.5-0.76):1; the acid catalyst is alkylbenzenesulfonic acid, p-toluenesulfonic acid, oxalic acid, hydrochloric acid or sulfuric acid; and the cashew nut oil-modified phenolic resin is C15 polyatomic phenol of which the side chain is provided with unsaturated double bonds. According to the preparation method of the cashew nut oil-modified phenolic resin provided by the invention, the problem of easiness in gelling a product in the prior art is solved, and the resin has the characteristic of low free phenol content. When taken as a reinforcing agent of rubber and a tire, the cashew nut oil-modified phenolic resin better contributes to improving the reinforcing performance of a sizing material than unmodified phenol-formaldehyde resin.

Description

technical field [0001] The invention relates to the modification of phenolic resin, in particular to a cashew nut oil modified phenolic resin used as a reinforcing agent for rubber and tires and a preparation method thereof. Background technique [0002] In recent years, due to the rising price of petrochemical raw materials and the gradual depletion of natural mineral resources, many researchers have tried to use renewable resources to synthesize polymers. Cashew nut oil is a by-product of cashew nut processing. After purification and decarboxylation, a phenolic compound with unsaturated fatty chains on the side of the phenol is obtained. Both the aromatic ring and the side chain of this phenolic compound are reactive. Under the action of a catalyst, cashew nut oil can not only react with formaldehyde, but also the double bond of the side chain can react with phenol. Therefore, cashew nut oil can be used in phenolic resin to modify the resin. [0003] There have been many...

Claims

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Application Information

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IPC IPC(8): C08G8/30C08L61/14
Inventor 王文芳刘慧娜李红伟董栋
Owner BEIJING RED AVENUE INNOVA
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